blocks|key|666345|text|您所需要做的就是向CIFilter索要过滤器名称。然后，您可以向每个筛选器请求其attributes，它返回一个字典，描述筛选器接受的每个输入和输出参数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|666346|NSArray*+filters+=+[CIFilter+filterNamesInCategories:nil];
for+(NSString*+filterName+in+filters)
{
++++NSLog(@"Filter:+%25@",+filterName);
++++NSLog(@"Parameters:+%25@",+[[CIFilter+filterWithName:filterName]+attributes]);
}|code-block|syntax|javascript|666347|例如，这是上述CIZoomBlur筛选器代码的输出：|666348|Filter:+CIZoomBlur
Parameters:+{
++++CIAttributeDescription+=+"Simulates+the+effect+of+zooming+the+camera+while+capturing+the+image.";
++++CIAttributeFilterCategories+=+++++(
++++++++CICategoryBlur,
++++++++CICategoryVideo,
++++++++CICategoryStillImage,
++++++++CICategoryBuiltIn
++++);
++++CIAttributeFilterDisplayName+=+"Zoom+Blur";
++++CIAttributeFilterName+=+CIZoomBlur;
++++CIAttributeReferenceDocumentation+=+"http://developer.apple.com/cgi-bin/apple_ref.cgi?apple_ref=//apple_ref/doc/filter/ci/CIZoomBlur";
++++inputAmount+=+++++{
++++++++CIAttributeClass+=+NSNumber;
++++++++CIAttributeDefault+=+20;
++++++++CIAttributeDescription+=+"The+zoom-in+amount.+Larger+values+result+in+more+zooming+in.";
++++++++CIAttributeDisplayName+=+Amount;
++++++++CIAttributeIdentity+=+0;
++++++++CIAttributeMin+=+0;
++++++++CIAttributeSliderMax+=+200;
++++++++CIAttributeSliderMin+=+0;
++++++++CIAttributeType+=+CIAttributeTypeDistance;
++++++++CIUIParameterSet+=+CIUISetBasic;
++++};
++++inputCenter+=+++++{
++++++++CIAttributeClass+=+CIVector;
++++++++CIAttributeDefault+=+"[150+150]";
++++++++CIAttributeDescription+=+"The+x+and+y+position+to+use+as+the+center+of+the+effect.";
++++++++CIAttributeDisplayName+=+Center;
++++++++CIAttributeType+=+CIAttributeTypePosition;
++++++++CIUIParameterSet+=+CIUISetBasic;
++++};
++++inputImage+=+++++{
++++++++CIAttributeClass+=+CIImage;
++++++++CIAttributeDescription+=+"The+image+to+use+as+an+input+image.+For+filters+that+also+use+a+background+image,+this+is+the+foreground+image.";
++++++++CIAttributeDisplayName+=+Image;
++++++++CIUIParameterSet+=+CIUISetBasic;
++++};
++++outputImage+=+++++{
++++++++CIAttributeClass+=+CIImage;
++++};
}|666349|不过，在大多数情况下，您可能只会使用the+docs。|666350|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/mac/#documentation/graphicsimaging/reference/CoreImageFilterReference/Reference/reference.html^0|9|8|14|A|0|0|7|A|0|0|I|8|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

All you need to do is ask <code>CIFilter</code> for the filter names. You can then ask each filter for its <code>attributes</code>, which returns a dictionary that describes each input and output parameter that the filter accepts.

<pre><code>NSArray* filters = [CIFilter filterNamesInCategories:nil];
for (NSString* filterName in filters)
{
 NSLog(@"Filter: %@", filterName);
 NSLog(@"Parameters: %@", [[CIFilter filterWithName:filterName] attributes]);
}
</code></pre>

For example, this is the output of the above code for the <code>CIZoomBlur</code> filter:

<pre class="lang-none prettyprint-override"><code>Filter: CIZoomBlur
Parameters: {
 CIAttributeDescription = "Simulates the effect of zooming the camera while capturing the image.";
 CIAttributeFilterCategories = (
 CICategoryBlur,
 CICategoryVideo,
 CICategoryStillImage,
 CICategoryBuiltIn
 );
 CIAttributeFilterDisplayName = "Zoom Blur";
 CIAttributeFilterName = CIZoomBlur;
 CIAttributeReferenceDocumentation = "http://developer.apple.com/cgi-bin/apple_ref.cgi?apple_ref=//apple_ref/doc/filter/ci/CIZoomBlur";
 inputAmount = {
 CIAttributeClass = NSNumber;
 CIAttributeDefault = 20;
 CIAttributeDescription = "The zoom-in amount. Larger values result in more zooming in.";
 CIAttributeDisplayName = Amount;
 CIAttributeIdentity = 0;
 CIAttributeMin = 0;
 CIAttributeSliderMax = 200;
 CIAttributeSliderMin = 0;
 CIAttributeType = CIAttributeTypeDistance;
 CIUIParameterSet = CIUISetBasic;
 };
 inputCenter = {
 CIAttributeClass = CIVector;
 CIAttributeDefault = "[150 150]";
 CIAttributeDescription = "The x and y position to use as the center of the effect.";
 CIAttributeDisplayName = Center;
 CIAttributeType = CIAttributeTypePosition;
 CIUIParameterSet = CIUISetBasic;
 };
 inputImage = {
 CIAttributeClass = CIImage;
 CIAttributeDescription = "The image to use as an input image. For filters that also use a background image, this is the foreground image.";
 CIAttributeDisplayName = Image;
 CIUIParameterSet = CIUISetBasic;
 };
 outputImage = {
 CIAttributeClass = CIImage;
 };
}
</code></pre>

Most of the time, though, you'll probably just use <a href="http://developer.apple.com/library/mac/#documentation/graphicsimaging/reference/CoreImageFilterReference/Reference/reference.html">the docs</a>.

blocks|key|666378|text|也许你可以尝试一下CIFilter类的方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|666379|%2B+(NSArray+*)filterNamesInCategory:(NSString+*)category|code-block|syntax|javascript|666380|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

May be you can try following method of CIFilter class

<pre><code>+ (NSArray *)filterNamesInCategory:(NSString *)category
</code></pre>

blocks|key|452143|text|NSLog(@"Distortion:+%25@",+[CIFilter+filterNamesInCategory:kCICategoryDistortionEffect]);
NSLog(@"Blurs:+%25@",+[CIFilter+filterNamesInCategory:kCICategoryBlur]);
NSLog(@"Color+effects:+%25@",+[CIFilter+filterNamesInCategory:kCICategoryColorEffect]);
NSLog(@"Color+adjustment:+%25@",+[CIFilter+filterNamesInCategory:kCICategoryColorAdjustment]);
NSLog(@"Built-in+effects:+%25@",+[CIFilter+filterNamesInCategory:kCICategoryBuiltIn]);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|452144|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>NSLog(@"Distortion: %@", [CIFilter filterNamesInCategory:kCICategoryDistortionEffect]);
NSLog(@"Blurs: %@", [CIFilter filterNamesInCategory:kCICategoryBlur]);
NSLog(@"Color effects: %@", [CIFilter filterNamesInCategory:kCICategoryColorEffect]);
NSLog(@"Color adjustment: %@", [CIFilter filterNamesInCategory:kCICategoryColorAdjustment]);
NSLog(@"Built-in effects: %@", [CIFilter filterNamesInCategory:kCICategoryBuiltIn]);
</code></pre>

blocks|key|666457|text|iOS+14，Swift+5|type|unstyled|depth|inlineStyleRanges|entityRanges|data|666458|必须承认，阅读起来并不容易，但答案必须与目标C的第一个答案相当。|666459|for+filtername+in+filters+{
++print("filter+\(filtername)")
++print("attributes+\(CIFilter.init(name:+filtername)?.attributes.keys.description)")
}|code-block|syntax|javascript|666460|产生这个..。|666461|filter+CIAccordionFoldTransition
attributes+Optional("[\"inputImage\",+\"CIAttributeFilterDisplayName\",+++++\"inputTargetImage\",+\"CIAttributeFilterAvailable_iOS\",+\"CIAttributeFilterAvailable_Mac\",+\"inputNumberOfFolds\",+\"inputFoldShadowAmount\",+\"inputBottomHeight\",+\"CIAttributeReferenceDocumentation\",+\"inputTime\",+\"CIAttributeFilterCategories\",+\"CIAttributeFilterName\"]")
filter+CIAdditionCompositing
attributes+Optional("[\"CIAttributeFilterCategories\",+\"CIAttributeFilterName\",+\"CIAttributeFilterDisplayName\",+\"inputImage\",+\"CIAttributeReferenceDocumentation\",+\"CIAttributeFilterAvailable_iOS\",+\"CIAttributeFilterAvailable_Mac\",+\"inputBackgroundImage\"]")|666462|因此，信息在这些长字符串中，您只需将其挑选出来:)|666463|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

iOS 14, Swift 5
Must confess not easy to read, but an answer that is comparable to the first one on Objective C.
<pre><code>for filtername in filters {
 print(&quot;filter \(filtername)&quot;)
 print(&quot;attributes \(CIFilter.init(name: filtername)?.attributes.keys.description)&quot;)
}
</code></pre>
Produces this ...
<pre><code>filter CIAccordionFoldTransition
attributes Optional(&quot;[\&quot;inputImage\&quot;, \&quot;CIAttributeFilterDisplayName\&quot;, \&quot;inputTargetImage\&quot;, \&quot;CIAttributeFilterAvailable_iOS\&quot;, \&quot;CIAttributeFilterAvailable_Mac\&quot;, \&quot;inputNumberOfFolds\&quot;, \&quot;inputFoldShadowAmount\&quot;, \&quot;inputBottomHeight\&quot;, \&quot;CIAttributeReferenceDocumentation\&quot;, \&quot;inputTime\&quot;, \&quot;CIAttributeFilterCategories\&quot;, \&quot;CIAttributeFilterName\&quot;]&quot;)
filter CIAdditionCompositing
attributes Optional(&quot;[\&quot;CIAttributeFilterCategories\&quot;, \&quot;CIAttributeFilterName\&quot;, \&quot;CIAttributeFilterDisplayName\&quot;, \&quot;inputImage\&quot;, \&quot;CIAttributeReferenceDocumentation\&quot;, \&quot;CIAttributeFilterAvailable_iOS\&quot;, \&quot;CIAttributeFilterAvailable_Mac\&quot;, \&quot;inputBackgroundImage\&quot;]&quot;)
</code></pre>
So the info is there in these long strings, you just need to pick it out :)

blocks|key|452295|text|Noah+Gilmore有一个非常方便的过滤器工具，可以演示和记录几乎所有的cifilter和filter参数。请参阅应用程序商店'CIFilter.io‘。他在https://cifilter.io网站上也有同样的内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|452296|entityMap|0|LINK|mutability|MUTABLE|url|https://cifilter.io/^0|29|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Noah Gilmore has a very handy filter tool to demo and document almost all cifilters &amp; filter parms..
See on the app store 'CIFilter.io'. He also has the same on the web site <a href="https://cifilter.io" rel="nofollow noreferrer">https://cifilter.io</a>

I am using the following code for exposure adjustment and its working. I need the filter names for sharpen, denoise, highlighs, color temperature, shadows, blur, etc.

<pre><code>[CIFilter filterWithName: @"CIExposureAdjust"
 keysAndValues: @"inputImage", [_imageView image], nil];
</code></pre>

How to get the list of filter names in CIFilter class?

Swift

我正在使用下面的代码进行曝光调整和它的工作。我需要锐化，去噪，高亮，色温，阴影，模糊等滤镜名称。[CIFilter filterWithName: @"CIExposureAdjust"                      keysAndValues: @"inputImage", [_imageView ima...

问如何在CIFilter类中获取过滤器名称列表？
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